<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wraper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wraper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div
        class="area"
        v-for="(item,key) of cities"
        :key="key"
        :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >
            {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.$store.commit('changeCity', city)
      this.$router.push('/')
    }
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<style scoped>
.list{
  position: absolute;
  top: 88px;
  right: 0;
  left: 0;
  bottom: 0;
  overflow: hidden;
}
.title{
  line-height: 27px;
  background: #eee;
  padding-left: 10px;
  color: #666;
  font-size: 16px;
}
.border-topBottom{
  border-bottom: 1px solid #ccc
}
.button-list{
  padding: 5px 30px 5px 5px;
  overflow: hidden;
}
.button-wraper{
  float: left;
  width: 33.3%;
}
.button{
  padding: 5px 0;
  text-align: center;
  margin:5px;
  border: 1px solid #ccc;
  border-radius: 3px;
}
.item-list .item{
  line-height: 30px;
  padding-left: 10px;
  border-bottom: 1px solid #ccc;
}
</style>
